wp_kses_hair_parse( string $attr ): array|false

1728function wp_kses_hair_parse( $attr ) {1729	if ( '' === $attr ) {1730		return array();1731	}1732 1733	$regex =1734		'(?:1735				[_a-zA-Z][-_a-zA-Z0-9:.]* # Attribute name.1736			|1737				\[\[?[^\[\]]+\]\]?        # Shortcode in the name position implies unfiltered_html.1738		)1739		(?:                               # Attribute value.1740			\s*=\s*                       # All values begin with "=".1741			(?:1742				"[^"]*"                   # Double-quoted.1743			|1744				\'[^\']*\'                # Single-quoted.1745			|1746				[^\s"\']+                 # Non-quoted.1747				(?:\s|$)                  # Must have a space.1748			)1749		|1750			(?:\s|$)                      # If attribute has no value, space is required.1751		)1752		\s*                               # Trailing space is optional except as mentioned above.1753		';1754 1755	/*1756	 * Although it is possible to reduce this procedure to a single regexp,1757	 * we must run that regexp twice to get exactly the expected result.1758	 *1759	 * Note: do NOT remove the `x` modifiers as they are essential for the above regex!1760	 */1761 1762	$validation = "/^($regex)+$/x";1763	$extraction = "/$regex/x";1764 1765	if ( 1 === preg_match( $validation, $attr ) ) {1766		preg_match_all( $extraction, $attr, $attrarr );1767		return $attrarr[0];1768	} else {1769		return false;1770	}1771}